seaweedfs/weed/s3api/auto_signature_v4_test.go
2021-04-08 17:40:47 +05:00

422 lines
12 KiB
Go

package s3api
import (
"bytes"
"crypto/md5"
"crypto/sha256"
"encoding/base64"
"encoding/hex"
"errors"
"fmt"
"github.com/chrislusf/seaweedfs/weed/s3api/s3err"
"io"
"io/ioutil"
"net/http"
"net/url"
"sort"
"strconv"
"strings"
"testing"
"time"
"unicode/utf8"
)
// TestIsRequestPresignedSignatureV4 - Test validates the logic for presign signature verision v4 detection.
func TestIsRequestPresignedSignatureV4(t *testing.T) {
testCases := []struct {
inputQueryKey string
inputQueryValue string
expectedResult bool
}{
// Test case - 1.
// Test case with query key ""X-Amz-Credential" set.
{"", "", false},
// Test case - 2.
{"X-Amz-Credential", "", true},
// Test case - 3.
{"X-Amz-Content-Sha256", "", false},
}
for i, testCase := range testCases {
// creating an input HTTP request.
// Only the query parameters are relevant for this particular test.
inputReq, err := http.NewRequest("GET", "http://example.com", nil)
if err != nil {
t.Fatalf("Error initializing input HTTP request: %v", err)
}
q := inputReq.URL.Query()
q.Add(testCase.inputQueryKey, testCase.inputQueryValue)
inputReq.URL.RawQuery = q.Encode()
actualResult := isRequestPresignedSignatureV4(inputReq)
if testCase.expectedResult != actualResult {
t.Errorf("Test %d: Expected the result to `%v`, but instead got `%v`", i+1, testCase.expectedResult, actualResult)
}
}
}
// Tests is requested authenticated function, tests replies for s3 errors.
func TestIsReqAuthenticated(t *testing.T) {
option := S3ApiServerOption{}
iam := NewIdentityAccessManagement(&option)
iam.identities = []*Identity{
{
Name: "someone",
Credentials: []*Credential{
{
AccessKey: "access_key_1",
SecretKey: "secret_key_1",
},
},
Actions: nil,
},
}
// List of test cases for validating http request authentication.
testCases := []struct {
req *http.Request
s3Error s3err.ErrorCode
}{
// When request is unsigned, access denied is returned.
{mustNewRequest("GET", "http://127.0.0.1:9000", 0, nil, t), s3err.ErrAccessDenied},
// When request is properly signed, error is none.
{mustNewSignedRequest("GET", "http://127.0.0.1:9000", 0, nil, t), s3err.ErrNone},
}
// Validates all testcases.
for i, testCase := range testCases {
if _, s3Error := iam.reqSignatureV4Verify(testCase.req); s3Error != testCase.s3Error {
ioutil.ReadAll(testCase.req.Body)
t.Fatalf("Test %d: Unexpected S3 error: want %d - got %d", i, testCase.s3Error, s3Error)
}
}
}
func TestCheckAdminRequestAuthType(t *testing.T) {
option := S3ApiServerOption{}
iam := NewIdentityAccessManagement(&option)
iam.identities = []*Identity{
{
Name: "someone",
Credentials: []*Credential{
{
AccessKey: "access_key_1",
SecretKey: "secret_key_1",
},
},
Actions: nil,
},
}
testCases := []struct {
Request *http.Request
ErrCode s3err.ErrorCode
}{
{Request: mustNewRequest("GET", "http://127.0.0.1:9000", 0, nil, t), ErrCode: s3err.ErrAccessDenied},
{Request: mustNewSignedRequest("GET", "http://127.0.0.1:9000", 0, nil, t), ErrCode: s3err.ErrNone},
{Request: mustNewPresignedRequest("GET", "http://127.0.0.1:9000", 0, nil, t), ErrCode: s3err.ErrNone},
}
for i, testCase := range testCases {
if _, s3Error := iam.reqSignatureV4Verify(testCase.Request); s3Error != testCase.ErrCode {
t.Errorf("Test %d: Unexpected s3error returned wanted %d, got %d", i, testCase.ErrCode, s3Error)
}
}
}
// Provides a fully populated http request instance, fails otherwise.
func mustNewRequest(method string, urlStr string, contentLength int64, body io.ReadSeeker, t *testing.T) *http.Request {
req, err := newTestRequest(method, urlStr, contentLength, body)
if err != nil {
t.Fatalf("Unable to initialize new http request %s", err)
}
return req
}
// This is similar to mustNewRequest but additionally the request
// is signed with AWS Signature V4, fails if not able to do so.
func mustNewSignedRequest(method string, urlStr string, contentLength int64, body io.ReadSeeker, t *testing.T) *http.Request {
req := mustNewRequest(method, urlStr, contentLength, body, t)
cred := &Credential{"access_key_1", "secret_key_1"}
if err := signRequestV4(req, cred.AccessKey, cred.SecretKey); err != nil {
t.Fatalf("Unable to inititalized new signed http request %s", err)
}
return req
}
// This is similar to mustNewRequest but additionally the request
// is presigned with AWS Signature V4, fails if not able to do so.
func mustNewPresignedRequest(method string, urlStr string, contentLength int64, body io.ReadSeeker, t *testing.T) *http.Request {
req := mustNewRequest(method, urlStr, contentLength, body, t)
cred := &Credential{"access_key_1", "secret_key_1"}
if err := preSignV4(req, cred.AccessKey, cred.SecretKey, int64(10*time.Minute.Seconds())); err != nil {
t.Fatalf("Unable to inititalized new signed http request %s", err)
}
return req
}
// Returns new HTTP request object.
func newTestRequest(method, urlStr string, contentLength int64, body io.ReadSeeker) (*http.Request, error) {
if method == "" {
method = "POST"
}
// Save for subsequent use
var hashedPayload string
var md5Base64 string
switch {
case body == nil:
hashedPayload = getSHA256Hash([]byte{})
default:
payloadBytes, err := ioutil.ReadAll(body)
if err != nil {
return nil, err
}
hashedPayload = getSHA256Hash(payloadBytes)
md5Base64 = getMD5HashBase64(payloadBytes)
}
// Seek back to beginning.
if body != nil {
body.Seek(0, 0)
} else {
body = bytes.NewReader([]byte(""))
}
req, err := http.NewRequest(method, urlStr, body)
if err != nil {
return nil, err
}
if md5Base64 != "" {
req.Header.Set("Content-Md5", md5Base64)
}
req.Header.Set("x-amz-content-sha256", hashedPayload)
// Add Content-Length
req.ContentLength = contentLength
return req, nil
}
// getSHA256Hash returns SHA-256 hash in hex encoding of given data.
func getSHA256Hash(data []byte) string {
return hex.EncodeToString(getSHA256Sum(data))
}
// getMD5HashBase64 returns MD5 hash in base64 encoding of given data.
func getMD5HashBase64(data []byte) string {
return base64.StdEncoding.EncodeToString(getMD5Sum(data))
}
// getSHA256Hash returns SHA-256 sum of given data.
func getSHA256Sum(data []byte) []byte {
hash := sha256.New()
hash.Write(data)
return hash.Sum(nil)
}
// getMD5Sum returns MD5 sum of given data.
func getMD5Sum(data []byte) []byte {
hash := md5.New()
hash.Write(data)
return hash.Sum(nil)
}
// getMD5Hash returns MD5 hash in hex encoding of given data.
func getMD5Hash(data []byte) string {
return hex.EncodeToString(getMD5Sum(data))
}
var ignoredHeaders = map[string]bool{
"Authorization": true,
"Content-Type": true,
"Content-Length": true,
"User-Agent": true,
}
// Sign given request using Signature V4.
func signRequestV4(req *http.Request, accessKey, secretKey string) error {
// Get hashed payload.
hashedPayload := req.Header.Get("x-amz-content-sha256")
if hashedPayload == "" {
return fmt.Errorf("Invalid hashed payload")
}
currTime := time.Now()
// Set x-amz-date.
req.Header.Set("x-amz-date", currTime.Format(iso8601Format))
// Get header map.
headerMap := make(map[string][]string)
for k, vv := range req.Header {
// If request header key is not in ignored headers, then add it.
if _, ok := ignoredHeaders[http.CanonicalHeaderKey(k)]; !ok {
headerMap[strings.ToLower(k)] = vv
}
}
// Get header keys.
headers := []string{"host"}
for k := range headerMap {
headers = append(headers, k)
}
sort.Strings(headers)
region := "us-east-1"
// Get canonical headers.
var buf bytes.Buffer
for _, k := range headers {
buf.WriteString(k)
buf.WriteByte(':')
switch {
case k == "host":
buf.WriteString(req.URL.Host)
fallthrough
default:
for idx, v := range headerMap[k] {
if idx > 0 {
buf.WriteByte(',')
}
buf.WriteString(v)
}
buf.WriteByte('\n')
}
}
canonicalHeaders := buf.String()
// Get signed headers.
signedHeaders := strings.Join(headers, ";")
// Get canonical query string.
req.URL.RawQuery = strings.Replace(req.URL.Query().Encode(), "+", "%20", -1)
// Get canonical URI.
canonicalURI := EncodePath(req.URL.Path)
// Get canonical request.
// canonicalRequest =
// <HTTPMethod>\n
// <CanonicalURI>\n
// <CanonicalQueryString>\n
// <CanonicalHeaders>\n
// <SignedHeaders>\n
// <HashedPayload>
//
canonicalRequest := strings.Join([]string{
req.Method,
canonicalURI,
req.URL.RawQuery,
canonicalHeaders,
signedHeaders,
hashedPayload,
}, "\n")
// Get scope.
scope := strings.Join([]string{
currTime.Format(yyyymmdd),
region,
"s3",
"aws4_request",
}, "/")
stringToSign := "AWS4-HMAC-SHA256" + "\n" + currTime.Format(iso8601Format) + "\n"
stringToSign = stringToSign + scope + "\n"
stringToSign = stringToSign + getSHA256Hash([]byte(canonicalRequest))
date := sumHMAC([]byte("AWS4"+secretKey), []byte(currTime.Format(yyyymmdd)))
regionHMAC := sumHMAC(date, []byte(region))
service := sumHMAC(regionHMAC, []byte("s3"))
signingKey := sumHMAC(service, []byte("aws4_request"))
signature := hex.EncodeToString(sumHMAC(signingKey, []byte(stringToSign)))
// final Authorization header
parts := []string{
"AWS4-HMAC-SHA256" + " Credential=" + accessKey + "/" + scope,
"SignedHeaders=" + signedHeaders,
"Signature=" + signature,
}
auth := strings.Join(parts, ", ")
req.Header.Set("Authorization", auth)
return nil
}
// preSignV4 presign the request, in accordance with
// http://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-query-string-auth.html.
func preSignV4(req *http.Request, accessKeyID, secretAccessKey string, expires int64) error {
// Presign is not needed for anonymous credentials.
if accessKeyID == "" || secretAccessKey == "" {
return errors.New("Presign cannot be generated without access and secret keys")
}
region := "us-east-1"
date := time.Now().UTC()
scope := getScope(date, region)
credential := fmt.Sprintf("%s/%s", accessKeyID, scope)
// Set URL query.
query := req.URL.Query()
query.Set("X-Amz-Algorithm", signV4Algorithm)
query.Set("X-Amz-Date", date.Format(iso8601Format))
query.Set("X-Amz-Expires", strconv.FormatInt(expires, 10))
query.Set("X-Amz-SignedHeaders", "host")
query.Set("X-Amz-Credential", credential)
query.Set("X-Amz-Content-Sha256", unsignedPayload)
// "host" is the only header required to be signed for Presigned URLs.
extractedSignedHeaders := make(http.Header)
extractedSignedHeaders.Set("host", req.Host)
queryStr := strings.Replace(query.Encode(), "+", "%20", -1)
canonicalRequest := getCanonicalRequest(extractedSignedHeaders, unsignedPayload, queryStr, req.URL.Path, req.Method)
stringToSign := getStringToSign(canonicalRequest, date, scope)
signingKey := getSigningKey(secretAccessKey, date, region, "s3")
signature := getSignature(signingKey, stringToSign)
req.URL.RawQuery = query.Encode()
// Add signature header to RawQuery.
req.URL.RawQuery += "&X-Amz-Signature=" + url.QueryEscape(signature)
// Construct the final presigned URL.
return nil
}
// EncodePath encode the strings from UTF-8 byte representations to HTML hex escape sequences
//
// This is necessary since regular url.Parse() and url.Encode() functions do not support UTF-8
// non english characters cannot be parsed due to the nature in which url.Encode() is written
//
// This function on the other hand is a direct replacement for url.Encode() technique to support
// pretty much every UTF-8 character.
func EncodePath(pathName string) string {
if reservedObjectNames.MatchString(pathName) {
return pathName
}
var encodedPathname string
for _, s := range pathName {
if 'A' <= s && s <= 'Z' || 'a' <= s && s <= 'z' || '0' <= s && s <= '9' { // §2.3 Unreserved characters (mark)
encodedPathname = encodedPathname + string(s)
continue
}
switch s {
case '-', '_', '.', '~', '/': // §2.3 Unreserved characters (mark)
encodedPathname = encodedPathname + string(s)
continue
default:
len := utf8.RuneLen(s)
if len < 0 {
// if utf8 cannot convert return the same string as is
return pathName
}
u := make([]byte, len)
utf8.EncodeRune(u, s)
for _, r := range u {
hex := hex.EncodeToString([]byte{r})
encodedPathname = encodedPathname + "%" + strings.ToUpper(hex)
}
}
}
return encodedPathname
}